Skip to main content

Table 1 2D peak position and sharpness, I G /I 2D ratio

From: Laser-induced etching of few-layer graphene synthesized by Rapid-Chemical Vapour Deposition on Cu thin films

  Graphene on Cu Graphene on SiO 2
Acquisition Raman Shift FWHM IG/I2D Raman Shift FWHM IG/I2D
  (cm-1) (cm-1)   (cm-1) (cm-1)  
1 2711.4 70.0 0.86 2704.0 40.3 1.01
2 2701.3 60.0 0.60 2702.7 37.7 0.79
3 2699.8 49.2 0.56 2699.0 43.8 0.80
4 2698.2 46.6 0.46 2701.1 38.7 0.61
  1. Comparison of the position and FWHM of 2D peaks of subsequent Raman acquisitions as extracted by a single Lorentzian fit and evolution of the IG/I2D ratio (spectra from Figure7, Figure8). Uncertainties of the order of 0.01 – 0.04% for the 2D peak Raman shifts and of 3 – 6% for 2D peak FHWMs have been estimated. Note: results concerning transferred graphene are affected by a higher uncertainty because of pronounced secondary peaks (possibly due to residual PMMA used for graphene transfer) present in the Raman spectra (see Figure7(b)), making the fit procedure less accurate.